[PATCH 04/30] drm/amdgpu/gmc12: disallow gfxoff around TLB flushes

We need to disallow gfxoff if we touch GC MMIO registers.
At the moment we use KIQ or MES for TLB flushes so
no intended functional change.

Signed-off-by: Alex Deucher <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
index 2c7e3eae7b237..3b7764b94de19 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v12_0.c
@@ -327,8 +327,14 @@ static void gmc_v12_0_flush_gpu_tlb(struct amdgpu_device *adev, uint32_t vmid,
 		return;
 	}
 
+	/* disabllow gfxoff when we invalidate */
+	if (vmhub == AMDGPU_GFXHUB(0))
+		amdgpu_gfx_off_ctrl(adev, false);
+
 	gmc_v12_0_flush_vm_hub(adev, vmid, vmhub, 0);
-	return;
+
+	if (vmhub == AMDGPU_GFXHUB(0))
+		amdgpu_gfx_off_ctrl(adev, true);
 }
 
 /**
-- 
2.55.0